Check the listing for details. Nioxin System #4 Cleanser Shampoo, 33.8 oz. Condition: New with box. Listed at 26.75 USD. Nioxin System #4 Cleanser Shampoo, 33.8 oz System 4 is specially designed for noticeably thinning, fine, chemically-treated hair. It delivers denser-looking hair while protecting the scalp and providing moisture balance to colored hair. System 4 Cleanser helps to remove follicle-clogging sebum, fatty acids, and environmental residues from the scalp skin, and hair. Cleanses to provide thicker-looking hair. The NIOXIN System 4 Cleanser Shampoo is formulated with Pro-Color Shield technology that helps remove sebum, fatty acids, and other environmental residue from the scalp and hair. Benefits: Detoxifying shampoo for progressed thinning, colored/chemically treated hair. This detoxifying shampoo removes buildup, pollutants, and toxins to leave hair growing healthily with body, volume, and shine. Provides an optimum scalp environment. Directions: Apply to wet hair, gently massage into scalp and hair. Lather 1 minute. Rinse thoroughly. Use daily